diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 8811bdbc220a..bad8e0af5e28 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -12098,6 +12098,11 @@
     githubId = 59313755;
     name = "Maxim Karasev";
   };
+  mxmlnkn = {
+    github = "mxmlnkn";
+    githubId = 6842824;
+    name = "Maximilian Knespel";
+  };
   myaats = {
     email = "mats@mats.sh";
     github = "Myaats";
diff --git a/pkgs/development/python-modules/indexed-bzip2/default.nix b/pkgs/development/python-modules/indexed-bzip2/default.nix
new file mode 100644
index 000000000000..d6c82e3aec9a
--- /dev/null
+++ b/pkgs/development/python-modules/indexed-bzip2/default.nix
@@ -0,0 +1,31 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "indexed_bzip2";
+  version = "1.5.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-tKf9odadfQZQYJz//vWYpeB99Z8VLg+hEPvfEHXgdnM=";
+  };
+
+  # has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "indexed_bzip2" ];
+
+  meta = with lib; {
+    description = "Python library for parallel decompression and seeking within compressed bzip2 files";
+    homepage = "https://github.com/mxmlnkn/indexed_bzip2";
+    license = licenses.mit; # dual MIT and asl20, https://internals.rust-lang.org/t/rationale-of-apache-dual-licensing/8952
+    maintainers = with lib.maintainers; [ mxmlnkn ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/python-modules/indexed-gzip/default.nix b/pkgs/development/python-modules/indexed-gzip/default.nix
new file mode 100644
index 000000000000..73ad916f35f8
--- /dev/null
+++ b/pkgs/development/python-modules/indexed-gzip/default.nix
@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, cython
+, zlib
+}:
+
+buildPythonPackage rec {
+  pname = "indexed_gzip";
+  version = "1.8.5";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-h9JgYq9KxmknaRuMgq+5YWA8tUaFk+lclkqdNAnr/cI=";
+  };
+
+  nativeBuildInputs = [ cython ];
+
+  buildInputs = [ zlib ];
+
+  # Too complicated to get to work, not a simple pytest call.
+  doCheck = false;
+
+  pythonImportsCheck = [ "indexed_gzip" ];
+
+  meta = with lib; {
+    description = "Python library to seek within compressed gzip files";
+    homepage = "https://github.com/pauldmccarthy/indexed_gzip";
+    license = licenses.zlib;
+    maintainers = with lib.maintainers; [ mxmlnkn ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/python-modules/indexed-zstd/default.nix b/pkgs/development/python-modules/indexed-zstd/default.nix
new file mode 100644
index 000000000000..f9d643c8ff49
--- /dev/null
+++ b/pkgs/development/python-modules/indexed-zstd/default.nix
@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, cython
+, zstd
+}:
+
+buildPythonPackage rec {
+  pname = "indexed_zstd";
+  version = "1.6.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-icCerrv6ihBjSTS4Fsw7qhoA5ha8yegfMVRiIOhTvvY=";
+  };
+
+  nativeBuildInputs = [ cython ];
+
+  buildInputs = [ zstd.dev ];
+
+  # has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "indexed_zstd" ];
+
+  meta = with lib; {
+    description = "Python library to seek within compressed zstd files";
+    homepage = "https://github.com/martinellimarco/indexed_zstd";
+    license = licenses.mit;
+    maintainers = with lib.maintainers; [ mxmlnkn ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/python-modules/python-xz/default.nix b/pkgs/development/python-modules/python-xz/default.nix
new file mode 100644
index 000000000000..b5a2ed4e21f9
--- /dev/null
+++ b/pkgs/development/python-modules/python-xz/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, setuptools-scm
+}:
+
+buildPythonPackage rec {
+  pname = "python-xz";
+  version = "0.4.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-OYdGWTtwb6n6xZuMmI6rhgPh/iupGVERwLRSJ6OnfbM=";
+  };
+
+  nativeBuildInputs = [ setuptools-scm ];
+
+  # has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "xz" ];
+
+  meta = with lib; {
+    description = "Pure Python library for seeking within compressed xz files";
+    homepage = "https://github.com/Rogdham/python-xz";
+    license = licenses.mit;
+    maintainers = with lib.maintainers; [ mxmlnkn ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/python-modules/rapidgzip/default.nix b/pkgs/development/python-modules/rapidgzip/default.nix
new file mode 100644
index 000000000000..ace2bad62016
--- /dev/null
+++ b/pkgs/development/python-modules/rapidgzip/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, nasm
+}:
+
+buildPythonPackage rec {
+  pname = "rapidgzip";
+  version = "0.10.3";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-gtxF9V7OQb34Z0cCuTh/Lbe1ttCbdaY0zpM3KHHGGuw=";
+  };
+
+  nativeBuildInputs = [ nasm ];
+
+  # has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "rapidgzip" ];
+
+  meta = with lib; {
+    description = "Python library for parallel decompression and seeking within compressed gzip files";
+    homepage = "https://github.com/mxmlnkn/rapidgzip";
+    license = licenses.mit; # dual MIT and asl20, https://internals.rust-lang.org/t/rationale-of-apache-dual-licensing/8952
+    maintainers = with lib.maintainers; [ mxmlnkn ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/python-modules/ratarmount/default.nix b/pkgs/development/python-modules/ratarmount/default.nix
new file mode 100644
index 000000000000..1555dfca2197
--- /dev/null
+++ b/pkgs/development/python-modules/ratarmount/default.nix
@@ -0,0 +1,37 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, fusepy
+, ratarmountcore
+}:
+
+buildPythonPackage rec {
+  pname = "ratarmount";
+  version = "0.14.0";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-P+p0h+KuOsunPsXbRwxzAhr1XcEqMjQxHeHmA29+pDQ=";
+  };
+
+  propagatedBuildInputs = [ ratarmountcore fusepy ];
+
+  checkPhase = ''
+    runHook preCheck
+
+    python tests/tests.py
+
+    runHook postCheck
+  '';
+
+  meta = with lib; {
+    description = "Mounts archives as read-only file systems by way of indexing";
+    homepage = "https://github.com/mxmlnkn/ratarmount";
+    license = licenses.mit;
+    maintainers = with lib.maintainers; [ mxmlnkn ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/python-modules/ratarmountcore/default.nix b/pkgs/development/python-modules/ratarmountcore/default.nix
new file mode 100644
index 000000000000..49ffdb17cfa5
--- /dev/null
+++ b/pkgs/development/python-modules/ratarmountcore/default.nix
@@ -0,0 +1,48 @@
+{ lib
+, buildPythonPackage
+, fetchgit
+, pythonOlder
+, pytestCheckHook
+, indexed-bzip2
+, indexed-gzip
+, indexed-zstd
+, python-xz
+, rapidgzip
+, rarfile
+, zstandard     # Python bindings
+, zstd          # System tool
+}:
+
+buildPythonPackage rec {
+  pname = "ratarmountcore";
+  version = "0.6.0";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchgit {
+    url = "https://github.com/mxmlnkn/ratarmount";
+    # The revision is hardcoded for now to fix problems with the tests, which are not worthy of a new release
+    # tag because releases do not officially contain tests. On the next release, use the commented revision,
+    # which points to a release tag, instead.
+    #rev = "core-v${version}";
+    rev = "ea43572dfbac4770a27ef2169f72ff73ee4a4ae9";
+    hash = "sha256-sPApM5OW+UbujFXHSL4ptMaegajz7FNtXz/KftTlw+U=";
+    fetchSubmodules = true;
+  };
+
+  sourceRoot = "${src.name}/core";
+
+  propagatedBuildInputs = [ indexed-gzip indexed-bzip2 indexed-zstd python-xz rapidgzip rarfile ];
+
+  pythonImportsCheck = [ "ratarmountcore" ];
+
+  nativeCheckInputs = [ pytestCheckHook zstandard zstd ];
+
+  meta = with lib; {
+    description = "Library for accessing archives by way of indexing";
+    homepage = "https://github.com/mxmlnkn/ratarmount/tree/master/core";
+    license = licenses.mit;
+    maintainers = with lib.maintainers; [ mxmlnkn ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8efa242c7c22..4ef74d116811 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9372,6 +9372,8 @@ with pkgs;
 
   incron = callPackage ../tools/system/incron { };
 
+  indexed-bzip2 = with python3Packages; toPythonApplication indexed-bzip2;
+
   industrializer = callPackage ../applications/audio/industrializer { };
 
   inetutils = callPackage ../tools/networking/inetutils { };
@@ -12546,6 +12548,8 @@ with pkgs;
 
   ramfetch = callPackage ../tools/misc/ramfetch { };
 
+  rapidgzip = with python3Packages; toPythonApplication rapidgzip;
+
   rar = callPackage ../tools/archivers/rar { };
 
   rarcrack = callPackage ../tools/security/rarcrack { };
@@ -12554,6 +12558,8 @@ with pkgs;
 
   ratman = callPackage ../tools/networking/ratman { };
 
+  ratarmount = with python3Packages; toPythonApplication ratarmount;
+
   ratools = callPackage ../tools/networking/ratools { };
 
   ratt = callPackage ../applications/misc/ratt { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a0fd063b3e6e..fdf90d36ba3d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5254,6 +5254,12 @@ self: super: with self; {
 
   incremental = callPackage ../development/python-modules/incremental { };
 
+  indexed-bzip2 = callPackage ../development/python-modules/indexed-bzip2 { };
+
+  indexed-gzip = callPackage ../development/python-modules/indexed-gzip { inherit (pkgs) zlib; };
+
+  indexed-zstd = callPackage ../development/python-modules/indexed-zstd { inherit (pkgs) zstd; };
+
   infinity = callPackage ../development/python-modules/infinity { };
 
   inflect = callPackage ../development/python-modules/inflect { };
@@ -10768,6 +10774,8 @@ self: super: with self; {
 
   python-xmp-toolkit = callPackage ../development/python-modules/python-xmp-toolkit { };
 
+  python-xz = callPackage ../development/python-modules/python-xz { };
+
   python-zbar = callPackage ../development/python-modules/python-zbar { };
 
   pythran = callPackage ../development/python-modules/pythran {
@@ -11154,6 +11162,8 @@ self: super: with self; {
 
   rapidfuzz-capi = callPackage ../development/python-modules/rapidfuzz-capi { };
 
+  rapidgzip = callPackage ../development/python-modules/rapidgzip { inherit (pkgs) nasm; };
+
   rapt-ble = callPackage ../development/python-modules/rapt-ble { };
 
   rarfile = callPackage ../development/python-modules/rarfile {
@@ -11162,6 +11172,10 @@ self: super: with self; {
 
   rasterio = callPackage ../development/python-modules/rasterio { };
 
+  ratarmountcore = callPackage ../development/python-modules/ratarmountcore { inherit (pkgs) zstd; };
+
+  ratarmount = callPackage ../development/python-modules/ratarmount { };
+
   ratelim = callPackage ../development/python-modules/ratelim { };
 
   ratelimit = callPackage ../development/python-modules/ratelimit { };